4 Fan Speeds (Low, Medium, High and Turbo) Power Saving DC Motor: 105W on turbo Plasma Technology Pre-Filter Clean Indicator HEPA and VOC Filter Replacement Indicator Independent Ionizer Control Convenient Filter Access for easy replacement Off-Timer: 1 to 8 Hours Casters for Portability LCD Display Remote Control ETL ARB Certified (this air cleaner complies with the federal ozone emissions limit)